Len Hopper is one of mine and everyone else's favorite professors at City College of New York / School of Architecture, Landscape Architecture and Urban Design / Landscape Architecture. So what can I say? I haven't read this whole new book, of course. But the courses he taught on site planning and site technology were always very clear and well-illustrated.
He is a former president of the American Society of Landscape Architects and head of the New York City Housing Department Office of Landscape Architecture.